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How to evaluate a mutual fund in India: the metrics that actually matter
How to evaluate a mutual fund in India: expense ratio, rolling returns, alpha, information ratio, fund manager tenure, and portfolio concentration -- the six metrics that matter more than advertised past returns.
In one line
Evaluating a mutual fund requires comparing expense ratio (choose direct plan), 3-to-5-year rolling returns, consistent alpha generation, fund manager tenure, portfolio concentration, and style consistency against peers in the same category.
BazaarBaaziSource & method
Expense ratio: the cost that compounds against you
The expense ratio is the annual fee charged by the fund house, expressed as a percentage of assets under management (AUM), deducted daily from the fund's NAV. A direct plan expense ratio of 0.50 percent means the fund house takes Rs. 500 per year on every Rs. 1 lakh invested. Over 10 to 20 years, a 1 percent difference in expense ratio can mean a 10 to 20 percent difference in terminal corpus due to compounding.
Direct plans (bought through AMC websites, Zerodha, Groww, MF Central) have significantly lower expense ratios than regular plans (bought through distributors who earn a trail commission). SEBI caps expense ratios for equity funds; direct plans typically cost 0.5 to 1.0 percent less than regular plans. All else being equal, always prefer the direct plan.
Rolling returns: a better measure than point-to-point performance
Point-to-point returns (e.g., 3-year return as of today) are heavily dependent on the specific start and end dates. A fund's 3-year return includes a specific market cycle that may not repeat. Rolling returns calculate returns for every possible start date over a defined period: for example, every 3-year return from January 2015 to the present. The average and consistency of rolling returns tells you how reliably the fund has delivered across different market conditions.
A fund with a 3-year rolling return average of 15 percent and a standard deviation of 3 percent is more predictable than one with a 15 percent average and a 10 percent standard deviation. Value Research and MorningStar India provide rolling return analysis for SEBI-registered mutual funds. For index funds, the relevant metric is tracking error to the benchmark index: the lower, the better.
Alpha, manager tenure, and portfolio discipline
Alpha is the return generated by the fund above what would be expected given its level of market risk. Consistent positive alpha across both bull and bear markets is evidence of genuine fund management skill rather than lucky sector exposure. Negative alpha means the fund has underperformed what passive index exposure would have delivered at the same risk level.
Past returns are a product of the fund manager who generated them. When a fund manager leaves, the past record is no longer attributable to the person managing your money. Always check the current fund manager's tenure on AMFI data or the fund's factsheet. Also check portfolio concentration (top 10 holdings as a percentage of AUM) and style consistency: a large-cap fund that consistently holds significant mid-cap positions is drifting from its mandate, exposing you to risks you did not sign up for.
FAQ2 reader questions · AEO-eligible
Common questions on how to evaluate a mutual fund.
What is the difference between direct and regular mutual fund plans?
When you invest in a mutual fund through a distributor (a bank, an IFA, or a third-party platform that earns a commission), you buy the regular plan. When you invest directly through the AMC's own website, MF Central, or a commission-free direct platform (Groww direct, Zerodha Coin), you buy the direct plan. Both plans invest in the same portfolio of stocks or bonds managed by the same fund manager. The only difference is the expense ratio: the regular plan is more expensive because it includes a distribution commission built into the annual charge. The performance difference between direct and regular plans compounds over time and can amount to 1 to 2 percentage points of annual return difference over a decade.
How many years of track record should I look for before investing in a fund?
A minimum of 3 full years of track record across different market cycles (at least one correction and one recovery) is the practical minimum for assessment. Five to seven years covering at least one complete market cycle is better. For newly launched funds (less than 2 years old), the fund house track record in the same category (do they have other successful equity funds?), the fund manager's individual track record at previous fund houses, and the investment mandate are the evaluation inputs. Avoid investing in a new fund simply because it has no track record to compare against -- the correct comparison set is the category's existing funds.
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